大家都搜：
向下交换
1、payer swap───付款人互换
2、maniple swap───多重交换
3、currency swap───货币套换；[金融]互惠外汇信贷
4、swap for───交换
5、swap dealers───投机性掉期交易商；互换交易商
6、wife swap───HuanQi
7、swap───n.交换，调换；交易；交换之物；被交换者；互惠信贷；v.交换，调换；交易；以……作交换；代替
8、swap stories───交换故事
9、extinguishing swap───撤销掉期
1、This could be down to laziness, the cost of going out or simply not wanting too much personal contact with friends and family but just enough to swap brief messages and online chats。 It all adds up.───这可能是因为懒惰或是舍不得外出的花费，也可能仅仅是因为不想跟朋友和家人有太多面对面接触，认为简单发送几条信息或网上聊聊天就足够了。
2、This could be down to laziness, the cost of going out or simply not wanting too much personal contact with friends and family but just enough to swap brief messages and online chats.───释放空间使底层Cao作XiTong减小对交换空间的许求并且重用内存映射表。